Geneva, Switzerland, 13 July 2013

IEEE 1588 revision

Silvana Rodrigues,Director of System Engineering, IDT

silvana.rodrigues@idt.com

Joint IEEE-SA and ITU Workshop on Ethernet

Agenda

IEEE 1588 RevisionProject Authorization Request (PAR)PAR ItemsOther Proposals not explicitly stated in the PARArchitecture

Geneva, Switzerland,13 July 2013 2

IEEE 1588 Revision

Study Group to revise IEEE 1588 was formed to come up with a PAR, primarily the ScopeProject Authorization Request (PAR) was sent to IEEE NesComOfficers

Kang Lee (NIST), Sponsor, Project ManagerJohn Eidson, (UC Berkeley): Co-ChairDoug Arnold: Co-ChairHans Weibel (ZHAW), Vice-ChairSilvana Rodrigues (IDT): SecretaryJohn Mackay (Progeny Systems): Editor

Scope of the PAR

Several items have been included in the Scope of the PAR

Correct known technical and editorial errorsAddress Transparent Clock layer violationPrecision and accuracy improvementsSNMP-compliant MIBSecurityBackwards compatibility with version 2 is a must

Some proposals are not explicitly stated in the Scope of the PAR, as they were covered by other proposals

Correct known technical and editorial errors

Items dealt at the IEEE 1588 Interpretations Committee will be addressed

Transparent Clock Source Address will be clarifiedClarification is needed throughout the standard

Ex. ClockIdentity, Announce Receipt Timeout, Unicast

Correction of known errors

Clarification of layering, interfaces and protocol It will include clarification of systems that deploy different protocol options

Precision and AccuracyImprovements

Proposal includes the option to use Synchronous Ethernet for frequency synchronization at the physical layerAdd a clause to clearly describe the steps when a PTP link is being established for high accuracy

Definitions of dataset fields and TLVsHigh Accuracy state machine

Add a profile for High Accuracy

SNMP-compliant MIB

The proposal is to create a single IEEE 1588 MIB IEEE C37.238 (Power profile) and IEEE 802.1AS have defined their own MIB

Security

MACSec – link (MAC) based has been proposedCan use same mechanisms as other time transfer protocols (e.g. NTP security mechanism)Suppress Annex K

Backwards compatibility

Backwards compatibility with version 2 is a must

Other Proposals not explicitly stated in the PAR

Several working items have been proposed such as:

Support of multiple profiles on the same networkMapping of IEEE 1588 to 802.11 using 802.11vMultiple time sources and multiple time distribution methodsMixed mode multicast (sync/Announce) and unicast (delay_req/delay_resp)Review IPv6 mappingMultilane Ethernet (e.g. 40 and 100 Gigabit)

Architecture

Michael Teener gave a presentation on PTP ArchitectureIt highlighted some aspects where different profiles intersectGood discussion on how to solve this problem

Needs clarification in IEEE 1588Guidelines on the interaction of different profiles

Architecture cont’d

Agreed to revise the description of the IEEE 1588 architecture and layering of the protocol

Future modifications become easierReduce duplication between SDOs (ex. IEEE 802.1AS and IEEE 1588)

Next Steps

PAR was submitted on May 2, approved on June 13IEEE 1588 Working Group has been formed First Working Group teleconference call was July 3, 2013Working Group teleconference calls are scheduled for one hour on Wednesdays, twice a month (1st and 3rd week of each month)First face-to-face meeting will be in September 27-28 co-located with ISPCS